Strain gauge



FIG. 1 is a top plan view of a strain gauge, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the drawings represent portions of the straingauge that form no part of the claimed design.

CLAIM The ornamental design for a strain gauge, as shown and described.